.445 Gates/.445 Supermag Brass questions

[Maximinus Thrax]

I have a number of brass headstamped .445 Gates. For the life of me I can't find much on this stuff. I know it's an early headstamp for what is now called the .445 supermag but can't find much else about it...value, availability, or otherwise.

I also have some .303 British that has been resized to .445 Supermag along with a few pieces of headstamped .445 supermag.

I hear that shooting these things is something to be seen in order to be believed. Does anyone have any experience with it?

 

[fireball168]

Does anyone have any experience with it?

Starline makes brass, dies are readily available.

DW revolvers and T/C barrels are relatively common.

There are several rechambered 44 Magnums running around since the 2007 DNR regulation change.

I've played with a few barrels, kind of fun - but nothing spectacular.